Simulation of dielectrophoretic motion of microparticles using a molecular dynamics approach
2006 (English)In: 4th International Conference on Nanochannels, Microchannels and Minichannels, ICNMM2006, 2006, 1-10 p.Conference paper (Refereed)
We model and simulate dielectrophoresis of microscale particles using the finite element method. A soft sphere system molecular dynamics model is presented, which solves a set of equations for the motion of every particle. The model couples most of the significant forces, i.e. the dielectrophoresis (DEP) forces, the particle-particle electrostatic forces, particle-particle interfacial repulsive forces, particle-wall repulsive forces and the hydrodynamic forces in Stokes flow. Since the system of equations is stiff, an implicit scheme is used. To obtain the particle trajectories, a constant time-step is applied. We present some numerical tests computing hydrodynamic force, electrostatic force and DEP force using our model, including simulated trapping of particles in a micro channel by dielectrophoresis. The results are in agreement with the theories and the experimental observations.
Place, publisher, year, edition, pages
2006. 1-10 p.
Computer simulation; Electrostatics; Equations of motion; Finite element method; Mathematical models; Particles (particulate matter); Dielectrophoresis (DEP) forces; Electrostatic forces; Interfacial repulsive forces; Stokes flows
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-5518ISI: 000249885500001ScopusID: 2-s2.0-33847006942ISBN: 978-0-7918-4760-2OAI: oai:DiVA.org:kth-5518DiVA: diva2:9910
4th International Conference on Nanochannels, Microchannels and Minichannels, ICNMM2006; Limerick; Ireland
QC 201008202006-03-222006-03-222014-11-18Bibliographically approved